======= v. 3.8 =======
m_Map: some of the elements were removed in 5.3, so we don't need to modify them anymore
m_Map: adjusted fontsize / position for coordinates
m_Map: removed textures from the 'map options' dropdown
m_Map: adjusted coordinates position for big map
m_Map: .toc bump for 5.3

======= v. 3.3 =======
m_Map: some structural changes, general code clean up
m_Map: fixed coordinates 'jumpy' (flickering) behaviour when large world map is opened
m_Map: adjusted positions for number of elements including levelUP/DOWN buttons, WorldMapTitle frame and button, etc.
m_Map: applied a small hack to prevent World Map frame problems when map_scale = 1

about the fps issue:
Guys I'm trying hard to reproduce that behavior, but my fps barely drops by 5-10% when I open the map. I even tested Mapster in same conditions to see if its just m_Map that's causing this fps difference, but no, fps drops even more with mapster opened.

I've uploaded results to my hosting and you may feel free to check it out.

Could it be another add-on that conflicts with m_Map or even some sort of specific video configuration that can cause it?

I'd like to fix this issue (if there is one), but I can't fix something that I'm not able to reproduce. Anyway I'm opened to any suggestions and advices.

2sacrife: it was intended this way, however those blue blobs are still there on the Big map.

Well, I've done a test starting from 9:52 till 11:58:
 fully default UI, except 1 add-on with a tiny bit of code that allows easy add-ons toggling.
 not a single UI reload during the test
 enabled vertical sync and triple buffering
 completed 2 AVs and 4,5 SoTAs during the test
 the map was toggled about 20-30 times per battleground
 the map position was locked in place (via SetPoint)
 group icons style was enabled

I've honestly spent few hours trying to reproduce that behavior as you may see on the screenshots I posted, and I've yet to see those huge fps drops you guys told me about. So I would really really appreciate if you could supply me with a certain pattern to follow to reproduce those drops in fps.